In the following example:
template<class Foo>
struct FooBar
{
FooBar(Foo *pObj = 0) : pFoo_(pObj) {}
};
what does “*pObj = 0” mean?
In the following example: template<class Foo> struct FooBar { FooBar(Foo *pObj = 0) :
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In the following example:
template<class Foo>
struct FooBar
{
FooBar(Foo *pObj = 0) : pFoo_(pObj) {}
};
what does “*pObj = 0” mean?
It means that the default value of
pObj, if the caller doesn’t provide one, is0. In this particular case, it would have been better form to useNULL(which is usually a macro of0). There are now two ways of calling it: